Java代码
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/blog/1 HTTP GET = 得到id = 1的blog
/blog/1 HTTP DELETE = 删除 id = 1的blog
/blog/1 HTTP PUT = 更新id = 1的blog
/blog HTTP POST = 新增BLOG
首先,我们带着如下三个问题查看本文。
1. 如何在java构造没有扩展名的RESTful url,如 /forms/1,而不是 /forms/1.do
2. 由于我们要构造没有扩展名的url本来是处理静态资源的容器映射的,现在被我们的spring占用了,冲突怎么解决?
3. 浏览器的form标签不支持提交delete,put请求,如何曲线解决?
springmvc rest 实现
[email protected] [email protected] annotation提供的,[email protected](value= /blog/{id} ,method=RequestMethod.DELETE)即可处理/blog/1 的delete请求.
Java代码
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@RequestMapping(value= /blog/{id} ,method=RequestMethod.DELETE)
public ModelAndView delete(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) {
blogManager.removeById(id);
return new ModelAndView(LIST_ACTION);
}
Java代码
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@RequestMapping(value= /blog/{blogId}/message/{msgId} ,method=RequestMethod.DELETE)
public ModelAndView delete(@PathVariable( blogId ) Long blogId,@PathVariable( msgId ) Long msgId,HttpServletRequest request,HttpServletResponse response) {
}
Xml代码
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! 该servlet为tomcat,jetty等容器提供,将静态资源映射从/改为/static/目录,如原来访问 http://localhost/foo.css ,现在http://localhost/static/foo.css
servlet-mapping
servlet-name default /servlet-name
url-pattern /static/* /url-pattern
/servlet-mapping
servlet
servlet-name springmvc /servlet-name
servlet-class org.springframework.web.servlet.DispatcherServlet /servlet-class
load-on-startup 1 /load-on-startup
/servlet
! URL重写filter,用于将访问静态资源http://localhost/foo.css 转为http://localhost/static/foo.css
filter
filter-name UrlRewriteFilter /filter-name
filter-class org.tuckey.web.filters.urlrewrite.UrlRewriteFilter /filter-class
init-param
param-name confReloadCheckInterval /param-name
param-value 60 /param-value
/init-param
init-param
param-name logLevel /param-name
param-value DEBUG /param-value
/init-param
/filter
filter-mapping
filter-name UrlRewriteFilter /filter-name
url-pattern /* /url-pattern
/filter-mapping
! 覆盖default servlet的/, springmvc servlet将处理原来处理静态资源的映射
servlet-mapping
servlet-name springmvc /servlet-name
url-pattern / /url-pattern
/servlet-mapping
! 浏览器不支持put,delete等method,由该filter将/blog?_method=delete转换为标准的http delete方法
filter
filter-name HiddenHttpMethodFilter /filter-name
filter-class org.springframework.web.filter.HiddenHttpMethodFilter /filter-class
/filter
filter-mapping
filter-name HiddenHttpMethodFilter /filter-name
servlet-name springmvc /servlet-name
/filter-mapping
Java代码
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beans default-autowire= byName
! 自动搜索@Controller标注的类
context:component-scan base-package= com.**.controller /
bean >
3. Controller编写
Java代码
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/**
* @RequestMapping( /userinfo ) 具有层次关系,[email protected],
* 如下面示例, [email protected]( /new ),则URL为 /userinfo/new
*/
@Controller
@RequestMapping( /userinfo )
public class UserInfoController extends BaseSpringController{
//默认多列排序,example: username desc,createTime asc
protected static final String DEFAULT_SORT_COLUMNS = null;
private UserInfoManager userInfoManager;
private final String LIST_ACTION = redirect:/userinfo ;
/**
* 通过spring自动注入
**/
public void setUserInfoManager(UserInfoManager manager) {
this.userInfoManager = manager;
}
/** 列表 */
@RequestMapping
public ModelAndView index(HttpServletRequest request,HttpServletResponse response,UserInfo userInfo) {
PageRequest Map pageRequest = newPageRequest(request,DEFAULT_SORT_COLUMNS);
//pageRequest.getFilters(); //add custom filters
Page page = this.userInfoManager.findByPageRequest(pageRequest);
savePage(page,pageRequest,request);
return new ModelAndView( /userinfo/list , userInfo ,userInfo);
}
/** 进入新增 */
@RequestMapping(value= /new )
public ModelAndView _new(HttpServletRequest request,HttpServletResponse response,UserInfo userInfo) throws Exception {
return new ModelAndView( /userinfo/new , userInfo ,userInfo);
}
/** 显示 */
@RequestMapping(value= /{id} )
public ModelAndView show(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) throws Exception {
UserInfo userInfo = (UserInfo)userInfoManager.getById(id);
return new ModelAndView( /userinfo/show , userInfo ,userInfo);
}
/** 编辑 */
@RequestMapping(value= /{id}/edit )
public ModelAndView edit(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) throws Exception {
UserInfo userInfo = (UserInfo)userInfoManager.getById(id);
return new ModelAndView( /userinfo/edit , userInfo ,userInfo);
}
/** 保存新增 */
@RequestMapping(method=RequestMethod.POST)
public ModelAndView create(HttpServletRequest request,HttpServletResponse response,UserInfo userInfo) throws Exception {
userInfoManager.save(userInfo);
return new ModelAndView(LIST_ACTION);
}
/** 保存更新 */
@RequestMapping(value= /{id} ,method=RequestMethod.PUT)
public ModelAndView update(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) throws Exception {
UserInfo userInfo = (UserInfo)userInfoManager.getById(id);
bind(request,userInfo);
userInfoManager.update(userInfo);
return new ModelAndView(LIST_ACTION);
}
/** 删除 */
@RequestMapping(value= /{id} ,method=RequestMethod.DELETE)
public ModelAndView delete(@PathVariable Long id,HttpServletRequest request,HttpServletResponse response) {
userInfoManager.removeById(id);
return new ModelAndView(LIST_ACTION);
}
/** 批量删除 */
@RequestMapping(method=RequestMethod.DELETE)
public ModelAndView batchDelete(@RequestParam( items ) Long[] items,HttpServletRequest request,HttpServletResponse response) {
for(int i = 0; i items.length; i++) {
userInfoManager.removeById(items[i]);
}
return new ModelAndView(LIST_ACTION);
}
}
上面是rapid-framework 新版本生成器生成的代码,以后也将应用此规则,rest url中增删改查等基本方法与Controller的方法映射规则
Java代码
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/userinfo = index()
/userinfo/new = _new()
/userinfo/{id} = show()
/userinfo/{id}/edit = edit()
/userinfo POST = create()
/userinfo/{id} PUT = update()
/userinfo/{id} DELETE = delete()
/userinfo DELETE = batchDelete()
注(不使用 /userinfo/add = add() 方法是由于add这个方法会被maxthon浏览器当做广告链接过滤掉,因为包含ad字符)
4. jsp 编写
Html代码
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form:form action= ${ctx}/userinfo/${userInfo.userId} method= put
/form:form
生成的html内容如下, 生成一个hidden的_method=put,并于web.xml中的HiddenHttpMethodFilter配合使用,在服务端将post请求改为put请求
Java代码
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form id= userInfo action= /springmvc_rest_demo/userinfo/2 method= post
input type= hidden name= _method value= put /
/form
5. 静态资源的URL重写
如上我们描述,现因为将default servlet映射至/static/的子目录,现我们访问静态资源将会带一个/static/前缀.
如 /foo.gif, 现在访问该文件将是 /static/foo.gif.
那如何避免这个前缀呢,那就是应用URL rewrite,现我们使用 http://tuckey.org/urlrewrite/, 重写规则如下
Xml代码
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urlrewrite
! 访问jsp及jspx将不rewrite url,其它.js,.css,.gif等将重写,如 /foo.gif = /static/foo.gif
rule
condition operator= notequal next= and type= request-uri .*.jsp /condition
condition operator= notequal next= and type= request-uri .*.jspx /condition
from ^(/.*/..*)$ /from
to /static$1 /to
/rule
/urlrewrite